Improvement in molds for making school-globes



UNITED STATES PATENT EEICEO J. R. AGNEV, OF LANCASTER, PENNSYLVANIA.

IMPROVEMENT IN MOLDS FOR MAKING SCHOOL-GLOBES.

Specification` forming part ot' Letters Patent No. l13,379, dated July 5, 1864.

spective view of a modification of the same.

Similar letters of reference indicate correspending parts in all the figures. The object of this invention is a mold particularly intended for the manufacture of schoolglobes out of papeepulp or other suitable plastic material or materials. j

The invention consists in a mold composed of two parts, one convex and the other concave, which are fitted together by means of anges, which are perforated, if necessary tolet the water escape, and are held together by movable rings and adjustable spring-fasten ings, in combination with a channel leading` to the interior of the concave mold and with a plunger or follower, in such a manner that by the act'on of said follower'the 'material from which the globes or hemispheies are to be made can be compressed to any desired degree until the sprin g-i'astenin gs give way and allow the two parts of the mold to separate.

To enable others skilled in the art to malte and use my invention, I will proceed to de-` scribe it. t

The convex part A of my mold is turned out ot' a piece of wood or any other suitable material, and its top forms a hemispherical protuberance, c, corresponding in size to the intcrior of the hemispheres to be produced. Said convex part ofthe mold is provided with a foot, b, so that it will readily stand in an upright position, and two handles, c, serve for turning the two parts of the mold on the upper and under surfaces of the hemisphere molded, for the purpose of detaching them from the material and rendering its surface smooth. The convex part of the mold is provided with agrooved liange, d, which is intendedto receive the bottom edge of the concave mold B. This part of the mold is also l vided with small notches or perforations to let out the moisture that may be contained in the material from which the globes or hemispheres are to be made.

The two parts of the mold are held together by means of movable rings g h, one of which is attached to the convex and the other to the concave part of the mold, said rings being provided with lugs or earst' i and connected by spring-fastenings j jig. These spring fastenings may either be made of simple `springs of india-rubber or other suitable material, catching over the ears i t', as shown in Fig. 3,- or they may be made ot'` spring ji, adjustable by means of screw-bolts j', so that the power with which the rings g L are compressed can be regulated at pleasure.

The material from which the hemispherts are to be made is introduced intothe space f between the two parts of the mold through a channel, k, leading down through the center of the concave part of the mold. This channel is provided with a follower, l, which may either be forced down by a screw, m, as'shown in Fig. l of the drawings, or by means ofa lever and springs, the power of which may be graduated according to the pressure required. The upper end of the screw m forms a foot, on which the same, either alone or with the concave part of the mold, will stand when not used,

and a lever passing transversely through the shankof the screw serves to turn the same up ordown. The upper end of the concave part of the mold may be made square, as shown in Fig. 2, to receive the hand-lever n, which is used in separating the two parts of the mold from the material and to render the surfaces smooth. The movable rings g h are held together by pins o, which prevent the same from turning around spontaneously.

By means of this mold hemispheres of paperpulp, either alone or mixed with other matcrials-such as sawdust, or any other plastic material-may be introduced into the mold.

. and by suitable application of pressure formed into a hemisphere. The pressure to which the material is exposed is graduated by the springfasteningsjjit, when thefollower is depressed by the screw m but when a spring-lever is used for the purpose of depressing` said follower the pressure to which the material in the mold is exposed depends upon the 'power ot' springs acting on said lever.

It is obvious that this mold can be made ot' any desirable size, and by its aid schoolglobes can be produced in the most expeditious manner, and by connecting a number of molds and their plungers togetherin such a manner that the same can be operated simultaneously the work can be still further facilitated.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is y 1, The combination of the two parts A B of the mold with stationary flanges d e and movable anges g h, constructed and operating substantially as and for the purpose specified. 2. The plunger l, in combination with the screw on, or its equivalent, and with the two parts A B of the mold, constructed and operating substantially as and for the purpose set forth.

3. The spring-fastenings j jat, in combination with the plunger l, screw m, and convex and concave mold A B, constructed and operating in the manner and for the purpose substantially as herein shown and described.

JOHN R. AGNEVV.

W'itnesses:

D. W. PATTERSON, J. G. VAN CAMP. 

